What will the same completed work cost?
Start with the work that has to finish: executions per month, browser time per execution, concurrent browsers and network traffic. Choose the cheapest eligible plan for that workload. An hourly rate can be lower while the bill is higher because a plan floor, billing minimum or extra service applies.
For 10,000 runs lasting three minutes, browser time is 500 hours before rounding, setup and retries. At Notte's published $0.01 browser-hour rate, that meter is $5. Paid-plan eligibility and any proxy or Function usage still determine the total bill.
Compare the billing contract
Browserbase: Compare the public plan's included browser allowance and overage with the workflow's duration. Include proxy traffic and any separately priced services; an Arena browser-hour estimate does not describe the whole Browserbase bill.
Kernel: Use the plan and browser configuration in Kernel's pricing documentation. Managed networking, account allowances and app execution make a browser-hour comparison only one part of the decision.
Sources: browserbase.com [1] ↗kernel.sh [2] ↗
Compare operational limits
Browserbase: Browser and Function constraints have separate documentation. Check the account's concurrent browser limit, the Function runtime cap and the Function region rather than assuming a browser entitlement covers every execution path.
Kernel: Kernel documents concurrent browsers, browser creation rate and per-browser resources separately. Standby browsers can still consume concurrency. Pools change how browsers are acquired; they do not erase account limits.
Compare the execution model
Browserbase: A Function is TypeScript code published with an entry point. Invocation starts asynchronously, creates a browser, passes its connection URL to the handler, and stores the result, logs and session ID. Function webhooks report status changes.
Kernel: Deploy a TypeScript or Python App and expose Actions that callers invoke. Kernel co-locates code with the browser environments the app creates. An Action invocation is the execution unit rather than a bare CDP connection.
How to evaluate this choice
A useful cost comparison gives both a usage estimate and the eligible monthly plan. Keep an unsupported workload out of the price ranking even if a rate can be multiplied into an attractive number.
- Count attempted runs as well as successful runs.
- Apply the provider's rounding rule to each session before adding usage.
- Separate browser time, function compute, proxy traffic and identity services.
- Apply included credits once; do not add the same subscription fee again.
- Mark an ineligible plan as a capacity mismatch rather than a cheap option.
Requirements side by side
| Requirement | Browserbase | Kernel |
|---|---|---|
| Browser control | Documented | Documented |
| Saved browser state | Contexts | Documented |
| Code execution | TypeScript Functions | TypeScript / Python Apps |
| Deployment choice | Hosted service | Check deployment offering |
Sources: docs.browserbase.com [1] ↗docs.browserbase.com [2] ↗docs.browserbase.com [3] ↗docs.browserbase.com [4] ↗docs.browserbase.com [5] ↗kernel.sh [6] ↗kernel.sh [7] ↗kernel.sh [8] ↗kernel.sh [9] ↗kernel.sh [10] ↗kernel.sh [11] ↗
Which approach fits?
Choose Browserbase when you want to deploy TypeScript browser logic or already use Browserbase's browser and Stagehand tooling.
Browserbase tradeoff: An identity feature, a persisted Context and a Function secret solve different problems. Select the required combination instead of treating all three as automatic login.
Choose Kernel when your code makes many browser calls and you want to deploy it beside the browser, or you need Kernel's managed sign-in flow.
Kernel tradeoff: Browser-local code changes the deployment model. Check app action behavior, account limits and persistent-state ownership before moving an external worker into it.
A useful acceptance check
Write a pass/fail result for the real task before running the evaluation. Record the account, configuration and code version next to that result. Repeat failures need an explanation, not an automatically different browser configuration.
When Notte belongs on this shortlist
Browserbase's TypeScript Function contract is a reason to retain it when that is the deployed language your team wants. A move to Notte Functions includes a Python execution decision; moving only the browser can leave your existing controller in place.
Kernel's browser-local Apps make execution placement part of the decision. Compare the repeated action path with the proposed Notte controller or Function deployment before concluding that a lifecycle or hourly-rate difference decides the workflow.
Notte: Create an owned browser session, connect Playwright or Puppeteer over CDP, and stop the session when the work finishes. Browser lifecycle management remains necessary even when the control socket disconnects.
Consider this third option when its documented mechanism addresses a requirement left open by the two providers above. A working configuration on either original provider can still be the better choice; compare the task and ownership cost before switching.
Sources: docs.browserbase.com [1] ↗kernel.sh [2] ↗docs.notte.cc [3] ↗